Economies of scale in production
Economies of scale in trade and transportation
Falling transportation and communication costs
Proximity with other firms in the same industry
Advantages of diversity
The quest for the center (of the industry)
Buzz and bright lights

How to Rebuild Architecture - NYTimes.com2014/12/17Architects are "attempting to sell the public buildings and neighborhoods they don’t particularly want, in a language they don’t understand. In the meantime, we’ve ceded the rest of the built environment to hacks, with sprawl and dreck rolling out all around us."